Shelf



FIG. 1 is a top, front, and right side isometric view of a shelf showing our new design;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image of the right side;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

The partial broken line depiction of supports in FIGS. 1, 4 and 5 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a shelf, as shown and described. 